Assessment of the Contribution of BeiDou GEO, IGSO, and MEO Satellites to PPP in Asia-Pacific Region.
Assessment of the Contribution of BeiDou GEO, IGSO, and MEO Satellites to PPP in Asia-Pacific Region.
复制标题
北斗GEO、IGSO、MEO卫星对亚太地区PPP的贡献评估
DOI：
10.3390/s151229780
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发表时间：
2015-12-01
期刊：
影响因子：
--
通讯作者：
Liu X
中科院分区：
文献类型：
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作者：
Zhao Q;Wang C;Guo J;Liu X
与美国全球定位系统（GPS），俄罗斯全球导航卫星系统（GLONASS）和欧洲伽利略相比，正在发展的中国北斗卫星导航系统（BDS）不仅包括中地球轨道（MEO），而且还包括地球静止轨道（GEO）以及倾斜地球同步轨道（IGSO）卫星。本文研究了精密单点定位（PPP）和带模糊度解算（IAR）的精密单点定位。这三种不同类型的BDS卫星的贡献，在亚太地区购买力平价的评估使用的数据从选定的20个站点超过四周。通过使用不同卫星组合的各种PPP案例，总体上，在三种BDS卫星中，BDS IGSO对收敛时间的减少和定位精度的提高的贡献最大，特别是在东方向上，被识别。这些PPP的情况下，包括静态BDS的唯一解决方案和静态/动态模糊浮动和固定PPP与GPS和BDS的组合。统计结果表明，BDS GEO和MEO卫星的加入可以改善观测条件，并导致更好的PPP性能。然而，在与全球定位系统结合使用时，北斗系统对减少收敛时间的贡献不如全球轨道导航卫星系统那么大。就定位精度而言，GLONASS在垂直分量上的精度提高幅度大于BDS，而在水平分量上，通过将BDS IGSO和MEO纳入GLONASS，可以实现类似的改善。
In contrast to the US Global Positioning System (GPS), the Russian Global Navigation Satellite System (GLONASS) and the European Galileo, the developing Chinese BeiDou satellite navigation system (BDS) consists of not only Medium Earth Orbit (MEO), but also Geostationary Orbit (GEO) as well as Inclined Geosynchronous Orbit (IGSO) satellites. In this study, the Precise Point Positioning (PPP) and PPP with Integer Ambiguity Resolution (IAR) are obtained. The contributions of these three different types of BDS satellites to PPP in Asia–Pacific region are assessed using data from selected 20 sites over more than four weeks. By using various PPP cases with different satellite combinations, in general, the largest contribution of BDS IGSO among the three kinds of BDS satellites to the reduction of convergence time and the improvement of positioning accuracy, particularly in the east direction, is identified. These PPP cases include static BDS only solutions and static/kinematic ambiguity-float and -fixed PPP with the combination of GPS and BDS. The statistical results demonstrate that the inclusion of BDS GEO and MEO satellites can improve the observation condition and result in better PPP performance as well. When combined with GPS, the contribution of BDS to the reduction of convergence time is, however, not as significant as that of GLONASS. As far as the positioning accuracy is concerned, GLONASS improves the accuracy in vertical component more than BDS does, whereas similar improvement in horizontal component can be achieved by inclusion of BDS IGSO and MEO as GLONASS.